Cops yesterday returned to the SoHo store basement where a former bodega clerk claims he strangled little Etan Patz 33 years ago, taking case photos of the scene, sources said.

The visit by crime-scene detectives to the cellar of 448 West Broadway is part of an ongoing collection of evidence to bolster the pending prosecution of Pedro Hernandez, the New Jersey man who last month confessed to killing 6-year-old Etan on May 25, 1979.

On that date, Hernandez, now 51, was working in the bodega that occupied the lower floors of the address, and he has told authorities he lured Etan into the basement by promising him a soda.